fix(yazi): add debug logging and correct portal config

apps/yazi/default.nix

@@ -4,29 +4,34 @@
   ...
 }: let
   yazi-picker = pkgs.writeShellScriptBin "yazi-picker" ''
+    echo "--- $(date) ---" >> /tmp/yazi-picker.log
+    echo "Args: $@" >> /tmp/yazi-picker.log
+
     path="$1"
     [ -z "$path" ] && path="."
 
     if [ "$2" = "true" ]; then
-        # Save file mode
-        # In save mode, we might want to just open the directory, 
-        # but yazi --chooser-file works for picking a file to overwrite or a directory.
-        # For a "Save As" flow where you type a name, standard yazi chooser might be limited
-        # without custom lua, but selecting a directory works.
-        # For now, treat same as open.
-        :
+        echo "Mode: Save" >> /tmp/yazi-picker.log
+        # Future: handle save mode better (maybe prompts?)
+    else
+        echo "Mode: Open" >> /tmp/yazi-picker.log
     fi
 
     out="$HOME/.cache/yazi-chooser"
     rm -f "$out"
 
-    # We need to block until ghostty closes, or use --wait if available/default behavior.
-    # Ghostty -e does not automatically detach, so it should block.
+    echo "Launching ghostty..." >> /tmp/yazi-picker.log
     ${pkgs.ghostty}/bin/ghostty --class="yazi-picker" --title="File Picker" -e ${pkgs.yazi}/bin/yazi "$path" --chooser-file="$out"
+    ret=$?
+    echo "Ghostty exited with $ret" >> /tmp/yazi-picker.log
 
     if [ -f "$out" ]; then
-      cat "$out"
+      selected=$(cat "$out")
+      echo "Selected: $selected" >> /tmp/yazi-picker.log
+      echo "$selected"
       rm "$out"
+    else
+      echo "No selection" >> /tmp/yazi-picker.log
     fi
   '';
 in {